Gone on more vacations. I had many opportunities to but money was pretty tight for me my whole life, so I couldn't really afford it unless I wanted to be broke for a few months.
I think you are not alone on this one. Many don't take vacations. Europeans tend to take more vacations than Americans.. ..these days I travel more and tend to say "yes" more often to situations that go outside my comfort zone. I found setting up goals automatically via a computer to save an x amount of $ each day helps vs trying to do it manually.
This is a pretty interesting article on how to travel for long periods of time without costing ridiculous amounts of money that you may find interesting. http://www.thisamericangirl.com/2015/06/10/travel-with-no-money/
This is a good one. I think experiences are important. I try to skip being lazy at home and go visit more friends. Lazy days are nice too though